Night witnessing has been around since I joined the JWs in 1972. When the "special tract" work was going on (EVERY publisher was GIVEN 100 tracts to distribute within 10 days and night meetings for Field Service were scheduled at the KH every night but meeting nights) we were EXPECTED to go, just before 1975 it REALLY was pushed where I lived back then. (Western MA)
We had to MAKE SURE (tm) that EVERYONE in the territory had been witnessed to cuz the END was NEAR !
Annie........who was in my 30's back then.......and now have grandchildren who are old enough to be married.....and STILL waiting for the "end"......